diff --git a/study/study.c b/study/study.c
new file mode 100644
index 0000000..6cb7173
--- /dev/null
+++ b/study/study.c
@@ -0,0 +1,10 @@
+#include "study.h"
+uint8_t g_class;
+void study_set_class(uint8_t class)
+{
+	g_class = class;
+}
+uint8_t study_get_class(void)
+{
+	return g_class;
+}
\ No newline at end of file
diff --git a/study/study.h b/study/study.h
new file mode 100644
index 0000000..ae6d744
--- /dev/null
+++ b/study/study.h
@@ -0,0 +1,4 @@
+#include "stdio.h"
+
+void study_set_class(uint8_t class);
+uint8_t study_get_class(void);
\ No newline at end of file