When the teachers fail to download the Certificate after the training, how can they download it later through XSEED Academy?

If the post test has been completed, the certificate will be available for download anytime by going to the training in the XSEED Academy tab and selecting the "Certificate" section.

Are we sending proficiency certificates to teachers based on their performance in post test for the follow up implementation test?

Teachers receive a Certificate of Participation for completing the post test for any Follow Up Training. Those who score well receive Honourary Distinction on their certificate.