Create an account and verify your email with an OTP code

Steps

1. Open the “Create account” page (click “Sign up” at the top of the home page, or “Create a new account” on the sign-in page).
2. Fill in your “Full name” and “Email address”. You can leave “Phone number (optional)” empty.
3. Click “Send code”. The screen always says “If this email can be registered, a verification code has been sent.” — for security reasons, Bút Nghiên doesn't reveal whether an email already has an account.
4. Open your inbox (check the spam folder too) and enter the code in the “6-digit verification code” box. No email yet? Wait for the 60 seconds to pass, then click “Resend code”.
5. For the question “Which mode do you want to start with?”, choose “Student mode” or “Teacher mode”. If you clicked “Sign up as a teacher” on the home page, “Teacher mode” is already selected.
6. Enter a “Password” (at least 8 characters) and “Confirm password”.
7. If this is your own device, tick “Remember me” to stay signed in for about 30 days; if you leave it unticked, the session ends after about 1 day (safer on a shared computer). Click “Sign up now”. If you haven't sent the code or haven't entered all 6 digits, the page says “Please send and enter the 6-digit verification code to complete sign-up.” Once you've signed up, you go straight to the dashboard for the mode you chose; if you came from a class or exam link, Bút Nghiên takes you back to that page.

Common errors and how to fix them

• “Please enter a valid email address before sending the code.” → check the email you typed.
• “You've sent too many requests. Please try again later.” → wait a while, then send again.
• “Couldn't send the verification code. Please try again.” → check your internet connection, then click send again.
• “The verification code is invalid or has expired. You can request a new one.” → click “Resend code” and use the code in the most recent email.
• “Please send and enter the 6-digit verification code to complete sign-up.” → you haven't clicked “Send code” yet, or you haven't entered all 6 digits of the code.
• “Password must be at least 8 characters.” or “Passwords don't match.” → fix the two password boxes.
• “Sign-up failed. The email may already be in use.” → try signing in with that email, or use “Forgot password?” to reset the password.