I left out these sentences. Could you please check them? Thank you.

1) We are delighted to welcome today representatives from the French and the German school with whom we will embark (work?) on our Comenius project.
2) We have searched with difficulty to find two schools that would be suitable to work with on our voyage of discovery.
3) Our science teacher has, as a result of hard work, succeeded in her task of establishing contact with suitable schools.

1) Today, we are delighted to welcome representatives from the French and German schools with whom we will embark on our Comenius project.

Generally, it's not a good idea to separate the verb from the direct object by a modifier. It cuts the sentence up awkwardly.

2) We have searched to find two schools that would be suitable to work with on our voyage of discovery.

3) As a result of hard work, our science teacher has succeeded in her task of establishing contact with suitable schools.
Generally, it's not a good idea to separate the verb from the direct object by a modifier. It cuts the sentence up awkwardly.