Could you please check the following sentences, please?

1) Our teachers haven't helped us at all to establish the objectives or the possible results of our project.
2) That's why I believe we should consider the possibility of including Finland in our partnership.
3) If their science teachers are ready to help us, we will certainly have a better chance to draw up the project by 21 February and have our project approved by the local agency.

Expected results (shall I include "to"??)
4) "to" monitor and protect endangered aquatic species, as well as their habitats
"to" collect scientific data to be used in future management plans and species protection and recovery
"to" increase public awareness on local biodiversity issues
to" improve co-operation by involving the local population in environmental protection activities.

1) Our teachers haven't helped us establish the objectives or the expected results of our project.

2) That's why I believe we should consider including Finland in our partnership.

3) OK

Expected results (shall I include "to"??) <~~yes

4) to monitor and protect endangered aquatic species, as well as their habitats.

to collect scientific data to be used in future management plans and species protection and recovery.

to increase public awareness about local biodiversity issues.

to improve co-operation by involving the local population in environmental protection activities.

1) Our teachers haven't helped us at all in establishing the objectives or the possible results of our project.

2) That's why I believe we should consider the possibility of including Finland in our partnership.
3) If their science teachers are ready to help us, we will certainly have a better chance of drawing up the project by 21 February and having our project approved by the local agency.

Expected results:
4) Monitor and protect endangered aquatic species, as well as their habitats.
Collect scientific data to be used in future management plans and species protection and recovery.
Increase public awareness of local biodiversity issues.
Improve cooperation by involving the local population in environmental protection activities.

The sentences you provided are grammatically correct as they are. However, if you're referring to the use of the preposition "to" in the expected results, you have correctly used it in the first three examples.

In the fourth example, you missed including "to" before "improve." So the correct sentence should be:

"to improve cooperation by involving the local population in environmental protection activities."

To answer your question, yes, you should include "to" before the specific verb in each expected result because it shows the purpose or intention of the action being described.