diff --git a/grade-tracker/Makefile b/grade-tracker/Makefile
new file mode 100755
index 0000000..d8b97ca
--- /dev/null
+++ b/grade-tracker/Makefile
@@ -0,0 +1,30 @@
+BIN_DIR = ./builds/
+BIN_NAME = grade-tracker
+SRC = grade-tracker.go
+
+all: linux-amd64 linux-arm64 windows-amd64 windows-arm64 mac-amd64 mac-arm64
+
+linux: linux-amd64 linux-arm64
+
+windows: windows-amd64 windows-arm64
+
+mac: mac-amd64 mac-arm64
+
+linux-amd64:
+	env GOOS=linux GOARCH=amd64 go build -o $(BIN_DIR)$(BIN_NAME)-linux-amd64 $(SRC)
+
+linux-arm64:
+	env GOOS=linux GOARCH=arm64 go build -o $(BIN_DIR)$(BIN_NAME)-linux-arm64 $(SRC)
+
+windows-amd64:
+	env GOOS=windows GOARCH=amd64 go build -o $(BIN_DIR)$(BIN_NAME)-win-amd64.exe $(SRC)
+
+windows-arm64:
+	env GOOS=windows GOARCH=arm64 go build -o $(BIN_DIR)$(BIN_NAME)-win-arm64.exe $(SRC)
+
+mac-amd64:
+	env GOOS=darwin GOARCH=amd64 go build -o $(BIN_DIR)$(BIN_NAME)-mac-amd64 $(SRC)
+
+mac-arm64:
+	env GOOS=darwin GOARCH=arm64 go build -o $(BIN_DIR)$(BIN_NAME)-mac-arm64 $(SRC)
+
diff --git a/grade-tracker/build-all.sh b/grade-tracker/build-all.sh
deleted file mode 100755
index 347d558..0000000
--- a/grade-tracker/build-all.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/usr/bin/env bash
-
-# linux
-env GOOS=linux GOARCH=amd64 go build -o builds/tracker-linux-amd64 tracker.go
-env GOOS=linux GOARCH=arm64 go build -o builds/tracker-linux-arm64 tracker.go
-
-# windows
-env GOOS=windows GOARCH=amd64 go build -o builds/tracker-win-amd64.exe tracker.go
-env GOOS=windows GOARCH=arm64 go build -o builds/tracker-win-arm64.exe tracker.go
-
-
-env GOOS=darwin GOARCH=amd64 go build -o builds/tracker-mac-amd64 tracker.go
-env GOOS=darwin GOARCH=arm64 go build -o builds/tracker-mac-arm64 tracker.go
diff --git a/grade-tracker/tracker.go b/grade-tracker/grade-tracker.go
similarity index 91%
rename from grade-tracker/tracker.go
rename to grade-tracker/grade-tracker.go
index 1e28c0f..3393357 100644
--- a/grade-tracker/tracker.go
+++ b/grade-tracker/grade-tracker.go
@@ -14,7 +14,7 @@ func usage(msg string) {
 	fmt.Println("  ", os.Args[0], " <file_name>")
 }
 
-func check(e error) {
+func checkError(e error) {
 	if e != nil {
 		fmt.Println(e)
 		os.Exit(1)
@@ -28,8 +28,13 @@ func main() {
 	}
 
 	file, err := os.Open(os.Args[1])
-	check(err)
-	defer file.Close()
+	checkError(err)
+	defer func(file *os.File) {
+		err := file.Close()
+		if err != nil {
+			fmt.Println(err)
+		}
+	}(file)
 
 	fmt.Println("Starting report for", os.Args[1])
 	fmt.Println("========================================================")
@@ -64,13 +69,13 @@ func main() {
 		name := strings.TrimSpace(fields[0])
 
 		achieved, err := strconv.ParseFloat(strings.TrimSpace(fields[1]), 32)
-		check(err)
+		checkError(err)
 
 		possible, err := strconv.ParseFloat(strings.TrimSpace(fields[2]), 32)
-		check(err)
+		checkError(err)
 
 		final, err := strconv.ParseFloat(strings.TrimSpace(fields[3]), 32)
-		check(err)
+		checkError(err)
 
 		if achieved > possible {
 			fmt.Println("Achieved is greater than possible for", name)