y shivam sheel,
 i did same steps as yours still its not working...

step 1:  create a custom object named "Project' giving out the api "Project__c"
             setup---->create---->objects----->new custom object----->label (type--> Project) [dont't do anything else as by default the data type is                    text itself ].
             click on save and you have now successfully created the custom project object with the api as required. 

step 2:   now go to the custom field and relationship  (scroll down u'll see) and click on new. Select the picklist and give the label as Priority 
             Give the values of the picklist as High(press enter) Medium(press enter) Low(press enter).
             The next page you will see two fields visible and read only . Select the visible box and next. 
             Thus now you have created a custom field Priority with api Priority__c which you can clearly see after saving.

step 3:   I'm considering that you must have already created the role of the Training Coordinator as in the previous challenge. If not please go                 back to the previous challenge and create the roles.If you still have problems do tell I'll help you out.

            NOW THE MAIN PARTS


step 4:    creating the sharing rule--------
          
                security control--->sharing settings
                
               On that page you will see  Manage sharing settings for :   from the droplist select the Project

              After you have done these..... scroll down and you will see Project Sharing Rules and click on NEW . 

             you will see various steps given on those page-------
   
                                   step 1: Rule Name
                                               Give any label name of your choice and the corresponding rule name will be automatically generated.

                                   Step 2: Select your rule type
                                               Check on the option given as Based on criteria 

                                    Step 3: Select which records to be shared  
                                                  Select the     Field   as    Priority    Operator     as    Equals          Value    as   High 
                                                  ( the value oh high can be obtained by clicking the search icon just next to the field ,search and insert the                                                             value or you can type too).


                                     Step 4: Select the users to share with
                                                      Share with: (droplist and select Roles)      -----Select One---- (droplist and select Training Coordinator)

                                    Step 5: Select the level of access for the users
                                                       Let the access level as Read Only itself.
                                                       and save.


              Our job is not over yet . People getting error messages as SHARING ROLE DOES NOT BEHAVE AS EXPECTED...​  is because you                 have performed well and accurately till step 4 but have not given the  Organization-wide defaults settings as private.
              To change the settings follow the step 5 which is much similar to the step 4.

step 5:     creating the sharing rule--------
          
                security control--->sharing settings
                
               On that page you will see  Manage sharing settings for :   from the droplist select the Project

              After you have done these.....
              
              you'll see Organization-wide defaults   , and click on EDIT.

              and set the Default Internal Access  to  Private . [ this is the thing which most of us miss] ,...because according to the first line of the                    challenge it should ve visible only by the user and upper level of heirarchy.

look at screen 




let me know what changes i need to.. 

thanks