diff --git a/app/Actions/Tabulation/EnterPrelimScore.php b/app/Actions/Tabulation/EnterPrelimScore.php
new file mode 100644
index 0000000..bf9d0c5
--- /dev/null
+++ b/app/Actions/Tabulation/EnterPrelimScore.php
@@ -0,0 +1,128 @@
+<?php
+
+namespace App\Actions\Tabulation;
+
+use App\Exceptions\AuditionAdminException;
+use App\Models\Entry;
+use App\Models\PrelimDefinition;
+use App\Models\PrelimScoreSheet;
+use App\Models\User;
+use DB;
+
+use function auditionLog;
+
+class EnterPrelimScore
+{
+    public function __invoke(
+        User $user,
+        Entry $entry,
+        array $scores,
+        PrelimScoreSheet|false $prelimScoreSheet = false
+    ): PrelimScoreSheet {
+        $scores = collect($scores);
+
+        // Basic Validity Checks
+        if (! User::where('id', $user->id)->exists()) {
+            throw new AuditionAdminException('User does not exist');
+        }
+        if (! Entry::where('id', $entry->id)->exists()) {
+            throw new AuditionAdminException('Entry does not exist');
+        }
+        if ($entry->audition->hasFlag('seats_published')) {
+            throw new AuditionAdminException('Cannot score an entry in an audition where seats are published');
+        }
+
+        // Check if the entries audition has a prelim definition
+        if (! PrelimDefinition::where('audition_id', $entry->audition->id)->exists()) {
+            throw new AuditionAdminException('The entries audition does not have a prelim');
+        }
+        $prelimDefinition = PrelimDefinition::where('audition_id', $entry->audition->id)->first();
+
+        // Check that the specified user is assigned to judge this entry in prelims
+        $check = DB::table('room_user')
+            ->where('user_id', $user->id)
+            ->where('room_id', $prelimDefinition->room_id)->exists();
+        if (! $check) {
+            throw new AuditionAdminException('This judge is not assigned to judge this entry in prelims');
+        }
+
+        // Check if a score already exists
+        if (! $prelimScoreSheet) {
+            if (PrelimScoreSheet::where('user_id', $user->id)->where('entry_id', $entry->id)->exists()) {
+                throw new AuditionAdminException('That judge has already entered a prelim score for that entry');
+            }
+        } else {
+            if ($prelimScoreSheet->user_id != $user->id) {
+                throw new AuditionAdminException('Existing score sheet is from a different judge');
+            }
+            if ($prelimScoreSheet->entry_id != $entry->id) {
+                throw new AuditionAdminException('Existing score sheet is for a different entry');
+            }
+        }
+
+        // Check the validity of submitted subscores, format array for storage, and sum score
+        $subscoresRequired = $prelimDefinition->scoringGuide->subscores;
+        $subscoresStorageArray = [];
+        $totalScore = 0;
+        $maxPossibleTotal = 0;
+        if ($scores->count() !== $subscoresRequired->count()) {
+            throw new AuditionAdminException('Invalid number of scores');
+        }
+
+        foreach ($subscoresRequired as $subscore) {
+            // check that there is an element in the $scores collection with the key = $subscore->id
+            if (! $scores->keys()->contains($subscore->id)) {
+                throw new AuditionAdminException('Invalid Score Submission');
+            }
+
+            if ($scores[$subscore->id] > $subscore->max_score) {
+                throw new AuditionAdminException('Supplied subscore exceeds maximum allowed');
+            }
+
+            // Add subscore to the storage array
+            $subscoresStorageArray[$subscore->id] = [
+                'score' => $scores[$subscore->id],
+                'subscore_id' => $subscore->id,
+                'subscore_name' => $subscore->name,
+            ];
+
+            // Multiply subscore by weight then add to total
+            $totalScore += ($subscore->weight * $scores[$subscore->id]);
+            $maxPossibleTotal += ($subscore->weight * $subscore->max_score);
+        }
+        $finalTotalScore = ($maxPossibleTotal === 0) ? 0 : (($totalScore / $maxPossibleTotal) * 100);
+
+        $entry->removeFlag('no_show');
+        if ($prelimScoreSheet instanceof PrelimScoreSheet) {
+            $prelimScoreSheet->update([
+                'user_id' => $user->id,
+                'entry_id' => $entry->id,
+                'subscores' => $subscoresStorageArray,
+                'total' => $finalTotalScore,
+            ]);
+        } else {
+            $prelimScoreSheet = PrelimScoreSheet::create([
+                'user_id' => $user->id,
+                'entry_id' => $entry->id,
+                'subscores' => $subscoresStorageArray,
+                'total' => $finalTotalScore,
+            ]);
+        }
+
+        // Log the prelim score entry
+        $log_message = 'Entered prelim score for entry id '.$entry->id.'.<br />';
+        $log_message .= 'Judge: '.$user->full_name().'<br />';
+        foreach ($prelimScoreSheet->subscores as $subscore) {
+            $log_message .= $subscore['subscore_name'].': '.$subscore['score'].'<br />';
+        }
+        $log_message .= 'Total :'.$prelimScoreSheet->total.'<br />';
+        auditionLog($log_message, [
+            'entries' => [$entry->id],
+            'users' => [$user->id],
+            'auditions' => [$entry->audition_id],
+            'students' => [$entry->student_id],
+        ]);
+
+        return $prelimScoreSheet;
+    }
+}
diff --git a/app/Models/Entry.php b/app/Models/Entry.php
index 9cbc7c3..ad57b42 100644
--- a/app/Models/Entry.php
+++ b/app/Models/Entry.php
@@ -136,6 +136,11 @@ class Entry extends Model
 
     }
 
+    public function prelimScoreSheets(): HasMany
+    {
+        return $this->hasMany(PrelimScoreSheet::class);
+    }
+
     public function bonusScores(): HasMany
     {
         return $this->hasMany(BonusScore::class);
diff --git a/app/Models/PrelimScoreSheet.php b/app/Models/PrelimScoreSheet.php
index d81fd71..2502e25 100644
--- a/app/Models/PrelimScoreSheet.php
+++ b/app/Models/PrelimScoreSheet.php
@@ -7,6 +7,15 @@ use Illuminate\Database\Eloquent\Relations\HasOne;
 
 class PrelimScoreSheet extends Model
 {
+    protected $fillable = [
+        'user_id',
+        'entry_id',
+        'subscores',
+        'total',
+    ];
+
+    protected $casts = ['subscores' => 'json'];
+
     public function user(): HasOne
     {
         return $this->hasOne(User::class);
diff --git a/tests/Feature/app/Actions/Tabulation/EnterPrelimScoreTest.php b/tests/Feature/app/Actions/Tabulation/EnterPrelimScoreTest.php
new file mode 100644
index 0000000..bc4587d
--- /dev/null
+++ b/tests/Feature/app/Actions/Tabulation/EnterPrelimScoreTest.php
@@ -0,0 +1,166 @@
+<?php
+
+use App\Actions\Tabulation\EnterPrelimScore;
+use App\Exceptions\AuditionAdminException;
+use App\Models\Audition;
+use App\Models\AuditLogEntry;
+use App\Models\Entry;
+use App\Models\PrelimDefinition;
+use App\Models\PrelimScoreSheet;
+use App\Models\Room;
+use App\Models\ScoringGuide;
+use App\Models\SubscoreDefinition;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    // Generate Scoring Guide
+    $this->prelimScoringGuide = ScoringGuide::factory()->create(['id' => 1000]);
+    SubscoreDefinition::create([
+        'id' => 1001,
+        'scoring_guide_id' => $this->prelimScoringGuide->id,
+        'name' => 'Scale',
+        'max_score' => 100,
+        'weight' => 1,
+        'display_order' => 1,
+        'tiebreak_order' => 3,
+        'for_seating' => '1',
+        'for_advance' => '0',
+    ]);
+    SubscoreDefinition::create([
+        'id' => 1002,
+        'scoring_guide_id' => $this->prelimScoringGuide->id,
+        'name' => 'Etude 1',
+        'max_score' => 100,
+        'weight' => 2,
+        'display_order' => 2,
+        'tiebreak_order' => 1,
+        'for_seating' => '1',
+        'for_advance' => '1',
+    ]);
+    SubscoreDefinition::create([
+        'id' => 1003,
+        'scoring_guide_id' => $this->prelimScoringGuide->id,
+        'name' => 'Etude 2',
+        'max_score' => 100,
+        'weight' => 2,
+        'display_order' => 3,
+        'tiebreak_order' => 2,
+        'for_seating' => '0',
+        'for_advance' => '1',
+    ]);
+    SubscoreDefinition::where('id', '<', 900)->delete();
+    $this->finalsRoom = Room::factory()->create();
+    $this->prelimRoom = Room::factory()->create();
+    $this->audition = Audition::factory()->create(['room_id' => $this->finalsRoom->id]);
+    $this->prelimDefinition = PrelimDefinition::create([
+        'room_id' => $this->prelimRoom->id,
+        'audition_id' => $this->audition->id,
+        'scoring_guide_id' => $this->prelimScoringGuide->id,
+        'passing_score' => 60,
+    ]);
+
+    $this->judge1 = User::factory()->create();
+    $this->judge2 = User::factory()->create();
+    $this->prelimRoom->judges()->attach($this->judge1->id);
+    $this->prelimRoom->judges()->attach($this->judge2->id);
+    $this->entry1 = Entry::factory()->create(['audition_id' => $this->audition->id]);
+    $this->entry2 = Entry::factory()->create(['audition_id' => $this->audition->id]);
+    $this->scribe = app(EnterPrelimScore::class);
+    $this->possibleScoreArray = [
+        1001 => 10,
+        1002 => 11,
+        1003 => 12,
+    ];
+    $this->anotherPossibleScoreArray = [
+        1001 => 20,
+        1002 => 21,
+        1003 => 22,
+    ];
+
+});
+
+it('can enter a prelim score', function () {
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+    expect($this->entry1->prelimScoreSheets()->count())->toBe(1)
+        ->and($this->entry1->prelimScoreSheets()->first()->total)->toBe(11.2);
+
+    ($this->scribe)($this->judge1, $this->entry2, $this->anotherPossibleScoreArray);
+    expect($this->entry2->prelimScoreSheets()->count())->toBe(1)
+        ->and($this->entry2->prelimScoreSheets()->first()->total)->toBe(21.2);
+});
+
+it('will not enter a score for a judge that does not exist', function () {
+    $fakeJudge = User::factory()->make();
+    ($this->scribe)($fakeJudge, $this->entry1, $this->possibleScoreArray);
+})->throws(AuditionAdminException::class, 'User does not exist');
+
+it('will not enter a score for an entry that does not exist', function () {
+    $fakeEntry = Entry::factory()->make();
+    ($this->scribe)($this->judge1, $fakeEntry, $this->possibleScoreArray);
+})->throws(AuditionAdminException::class, 'Entry does not exist');
+
+it('will not score an entry if the audition seats are published', function () {
+    $this->audition->addFlag('seats_published');
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+})->throws(AuditionAdminException::class, 'Cannot score an entry in an audition where seats are published');
+
+it('will not score an entry if the judge is not assigned to judge the entry', function () {
+    $fakeJudge = User::factory()->create();
+    ($this->scribe)($fakeJudge, $this->entry1, $this->possibleScoreArray);
+})->throws(AuditionAdminException::class, 'This judge is not assigned to judge this entry');
+
+it('can modify an existing score sheet', function () {
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+    $scoreSheet = PrelimScoreSheet::first();
+    ($this->scribe)($this->judge1, $this->entry1, $this->anotherPossibleScoreArray, $scoreSheet);
+    expect($this->entry1->prelimScoreSheets()->count())->toBe(1)
+        ->and($this->entry1->prelimScoreSheets()->first()->total)->toBe(21.2);
+});
+
+it('will not change the judge on a score sheet', function () {
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+    $scoreSheet = PrelimScoreSheet::first();
+    ($this->scribe)($this->judge2, $this->entry1, $this->anotherPossibleScoreArray, $scoreSheet);
+})->throws(AuditionAdminException::class, 'Existing score sheet is from a different judge');
+
+it('will not accept a second score sheet for a judge ane entry', function () {
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+    ($this->scribe)($this->judge1, $this->entry1, $this->anotherPossibleScoreArray);
+})->throws(AuditionAdminException::class, 'That judge has already entered a prelim score for that entry');
+
+it('will not change the entry on a score sheet', function () {
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+    $scoreSheet = PrelimScoreSheet::first();
+    ($this->scribe)($this->judge1, $this->entry2, $this->anotherPossibleScoreArray, $scoreSheet);
+})->throws(AuditionAdminException::class, 'Existing score sheet is for a different entry');
+
+it('will not accept an incorrect number of subscores', function () {
+    array_pop($this->possibleScoreArray);
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+})->throws(AuditionAdminException::class, 'Invalid number of scores');
+
+it('will not accept an invalid subscores', function () {
+    array_pop($this->possibleScoreArray);
+    $this->possibleScoreArray[3001] = 100;
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+})->throws(AuditionAdminException::class, 'Invalid Score Submission');
+
+it('will. not accept a subscore in excess of its maximum', function () {
+    $this->possibleScoreArray[1001] = 1500;
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+})->throws(AuditionAdminException::class, 'Supplied subscore exceeds maximum allowed');
+
+it('removes a no-show flag from an entry', function () {
+    $this->entry1->addFlag('no_show');
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+    expect($this->entry1->hasFlag('no_show'))->toBeFalse();
+});
+
+it('logs score entry', function () {
+    ($this->scribe)($this->judge1, $this->entry1, $this->possibleScoreArray);
+    $logEntry = AuditLogEntry::orderBy('id', 'desc')->first();
+    expect($logEntry->message)->toStartWith('Entered prelim score for entry id ');
+});