Yes, you can subscribe to Education.com for simply two months. If you choose the Monthly Plan, you will be billed $4.99 each month. If you decide that you no longer want PLUS, you can turn your auto-renewal to "off" which means you will no longer be charged.
For the annual PLUS plan, we do charge the entirety of the fee ($47.88) up front (it comes out to be $3.99 per month). After paying that, you will not be charged again to gain unlimited access to workbooks and advanced features to create custom workbooks.
I hope this helps! If you have any further questions, please contact our customer support team at email@example.com.